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<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        a{
        width: 120px;
        height: 58px;
        display: inline-block;
        text-decoration: none;
        color: azure;
        line-height: 40px;
        text-align: center;
        }   
.nve1{background-image: url(./images/images/bg1.png);}
.nve2{background-image: url(./images/images/bg2.png);}
.nve3{background-image: url(./images/images/bg3.png);}
.nve4{background-image: url(./images/images/bg4.png);}

.nve1:hover{background-image: url(./images/images/bg5.png);}
.nve2:hover{background-image: url(./images/images/bg6.png);}
.nve3:hover{background-image: url(./images/images/bg7.png);}
.nve4:hover{background-image: url(./images/images/bg8.png);}
    </style>
</head>

<body>
<a href="#" class="nve1">5彩导航</a>
<a href="#" class="nve2">5彩导航</a>
<a href="#" class="nve3">5彩导航</a>
<a href="#" class="nve4">5彩导航</a>
</body>

</html>